How to Clean Bird Droppings off Canvas Furniture

Brushing

Try brushing before adding anything else. If this works, then you're set; if not, move onto another method. Use an old toothbrush or a clean household brush.

Do this regularly. Keep an eye on canvas furniture, awnings and sails around the house. As soon as you spot bird droppings, remove them. The faster this is done, the easier the stain will be to remove.

Household soap

Brush off the droppings to remove anything that will come off easily. Use a household small dustpan brush to do this.

Rub the stain using mild, plain household soap. Dampen the bar of soap and rub it over the stain to cover. Leave the soap that has been rubbed on for half an hour.

Rinse off well with clean water.

Repeat the rub and rinse process until the bird droppings are removed.

Pressure wash and laundry liquid soap

Brush off the droppings to remove anything that will come off easily. Use a household small dustpan brush to do this.

Pressure wash the bird droppings stain off the canvas furniture. Check the strength of the canvas before doing this though. Strong canvas in good shape will be okay, such as that used for overhead sail cloths but finer and older canvas may be weaker and pressure washing could break the fibers. A hose wash without the pressure attachment but putting a finger over the end of the hose to produce a stronger spray may be better for more delicate canvas.

Apply a mild liquid laundry soap suitable for delicates or baby clothes on the stain. Mix 2 liters/1/2 gallon of warm water to 1/4 cup of liquid soap. Gently rub it over the stain to lift. If the canvas is removable, such as seat cushion covers, remove and wash in the washing machine using the mild liquid laundry soap. For really bad stains, using liquid soap may not suffice. See the section on using commercial preparations.

Wash off with the pressure washer or hose again.

Salt and lemon juice

Brush off the droppings to remove anything that will come off easily. Use a household small dustpan brush to do this.

Hose or pressure wash the stain with clean water. (See the previous method for tips about pressure washing with care.)

Make a paste of salt and lemon juice. One lemon should be sufficient for a standard stain but you'll need to judge by how large the extent of the bird droppings. Add enough salt to the juice to form a paste.

Rub the paste over the bird dropping stain that remains.

Let sit in full sunshine. When you find it hard to see the stain, it's time to remove the paste.

Wash off. Hopefully the stain will go with it.

Commercial preparation

Check the manufacturer's instructions. They may have recommended a product suitable for cleaning the canvas furniture. A lot of canvas furniture has special waterproofing features which must be considered when using a commercial cleaning product.

Ask for a recommendation at a store that sells canvas furniture. When selecting a product, check that it doesn't affect any waterproofing placed on the canvas. Some suggested options from a sweep of various online forums include: Barkeeper's Friend, LAs Totally Awesome and Spot Shot Upholstery Stain Remover. However, such products tend to be very strong and may cause new stains. If you do use them, always test a small patch first, to see if the product stains or removes waterproofing properties.